RSSI sampling on nRF54L?

[SebastianA]

With the nRF52840 we used RSSISTART to start the sampling of the RSSI and got a RSSIEND event when we could read the RSSISAMPLE register.

The radio on the nRF54L doesn't have the RSSIEND event. How do I know when I can read the RSSISAMPLE? Use a timer and wait 0.25us? Do we need to send RSSISTART again or does it continue to be updated every 0,25us until PHYEND/DISABLED?

If I want to know the maximum RSSI over a time period, is there a difference between reading the RSSISAMPLE at the beginning and then after every RSSIsettle time compared to reading it every 0.25us over the same period?

[ketiljo]

RSSISAMPLE is updated immediately after TASKS_RSSISTART. So the event wasn't useful and has been removed. TASKS_RSSISTART takes a single sample, the RSSISAMPLE register is updated only one. For the maximum RSSI over time, you need to trigger TASKS_RSSISTART multiple times and find the maximum by a software routine.